ProductDescription:Mast – 100 is a synthetic derivative of dihydrotestosterone, producing ananabolic effect by promoting protein synthesis, as well as creating a positivenitrogen balance in humans. Since it is a derivative of dihydrotestosterone,dromastolone di-propionate does not aromatize in any dosage and thus it cannotbe converted into estrogen. This is more suitable for competitive bodybuilderdue to no water retention. It also shapen your physic while dieting.